Alright, let's work through 70349991 times 99379583 step by step
70349991 × 99379583 = 99379583 × (70349991)
+ 99379583 × 1 that results in 99379583
+ 99379583 × 90 what gives us 8944162470
+ 99379583 × 900 what gives us 89441624700
+ 99379583 × 9000 yielding 894416247000
+ 99379583 × 40000 giving us 3975183320000
+ 99379583 × 300000 that equals 29813874900000
+ 99379583 × 0000000 giving us 0
+ 99379583 × 70000000 producing 6956570810000000

= 6991352769633753
