Alright, let's work through 7136 times 9902 step by step
7136 × 9902 = 9902 × (7136)
+ 9902 × 6 giving us 59412
+ 9902 × 30 that is equal 297060
+ 9902 × 100 that is equal 990200
+ 9902 × 7000 what gives us 69314000

= 70660672
