Alright, let's work through 7311157 times 18518387 step by step
7311157 × 18518387 = 18518387 × (7311157)
+ 18518387 × 7 what gives us 129628709
+ 18518387 × 50 that is equal 925919350
+ 18518387 × 100 giving us 1851838700
+ 18518387 × 1000 producing 18518387000
+ 18518387 × 10000 which equals 185183870000
+ 18518387 × 300000 giving us 5555516100000
+ 18518387 × 7000000 producing 129628709000000

= 135390834743759
