Alright, let's work through 70070279 times 15421203 step by step
70070279 × 15421203 = 15421203 × (70070279)
+ 15421203 × 9 yielding 138790827
+ 15421203 × 70 what gives us 1079484210
+ 15421203 × 200 resulting in 3084240600
+ 15421203 × 0000 that is equal 0
+ 15421203 × 70000 that equals 1079484210000
+ 15421203 × 000000 giving us 0
+ 15421203 × 0000000 resulting in 0
+ 15421203 × 70000000 that results in 1079484210000000

= 1080567996725637
