Scale factor for EVI in Google Earth Engine

Question

I'm new to GEE. I'm working on EVI data analysis. So this is my code for MODIS evi. I want to know how to multiply all the images there inside ImageCollection by scale factor 0.0001 to get real EVI values. Because my values are -2000, 10000

How do I get this work done?

var clipper = function(image){
  return image.clip(sureste);
};


Map.addLayer(sureste);
print(sureste);

var modis = ee.ImageCollection('MODIS/006/MOD13Q1')
  .map(clipper);
var months = ee.List.sequence(1,12);

// Group by month, and then reduce within groups by mean();
// the result is an ImageCollection with one image for each
// month.

var byMonth = ee.ImageCollection.fromImages(
      months.map(function(m) {
        return modis.filter(ee.Filter.calendarRange(m, m, 'month'))
                    .filterBounds(sureste)  
                    .select('EVI').mean().multiply()
                    .set('month', m);
}));

print("Monthly images",byMonth);

Answer 1

Following script, with arbitrary geometry sureste, prints values of EVI in Inspector Tab multiplied by 0.0001.

var sureste = 
    /* color: #d63000 */
    /* displayProperties: [
      {
        "type": "rectangle"
      }
    ] */
    ee.Geometry.Polygon(
        [[[-101.8302490234375, 22.848114623774645],
          [-101.8302490234375, 22.376523536444807],
          [-100.7755615234375, 22.376523536444807],
          [-100.7755615234375, 22.848114623774645]]], null, false);
var clipper = function(image){
  return image.clip(sureste);
};

var clipper = function(image){
  return image.clip(sureste);
};

Map.centerObject(sureste);
print(sureste);


var modis = ee.ImageCollection('MODIS/006/MOD13Q1')
  .map(clipper);
var months = ee.List.sequence(1,12);


// Group by month, and then reduce within groups by mean();
// the result is an ImageCollection with one image for each
// month.

var byMonth = ee.ImageCollection.fromImages(
      months.map(function(m) {
        return modis.filter(ee.Filter.calendarRange(m, m, 'month'))
                    .filterBounds(sureste)  
                    .select('EVI').mean().multiply(0.0001)
                    .set('month', m);
}));

var vis = {min: 0.0926025, max: 0.2744175, palette: [
    'FFFFFF', 'CE7E45', 'FCD163', '66A000', '207401',
    '056201', '004C00', '023B01', '012E01', '011301'
]};

print("Monthly images",byMonth);
Map.addLayer(byMonth, vis, "MODIS"); 

After running script in GEE, it can be observed in following image: