No problem, we've got 99821772 and 61520369 to multiply
99821772 × 61520369 = 61520369 × (99821772)
+ 61520369 × 2 that equals 123040738
+ 61520369 × 70 what gives us 4306425830
+ 61520369 × 700 which equals 43064258300
+ 61520369 × 1000 resulting in 61520369000
+ 61520369 × 20000 which equals 1230407380000
+ 61520369 × 800000 resulting in 49216295200000
+ 61520369 × 9000000 resulting in 553683321000000
+ 61520369 × 90000000 giving us 5536833210000000

= 6141072247673868
