Step 1: Recognize the breakdown for 2600×1600.
1600=1000+600
Step 2: Apply the distributive property.
2600×1600=2600×(1000+600)
=2600×1000+2600×600
Step 3: Compute 2600×1000.
Note: 2600×1000=2,600×1,000=2,600,000
Step 4: Compute 2600×600.
2600×600=2600×(6×100)
=(2600×6)×100
2600×6=(2000×6)+(600×6)
=12,000+3,600=15,600
15,600×100=1,560,000
Step 5: Add the products.
2,600,000+1,560,000=4,160,000
Final answer: 4160000