Alright, let's work through 9901 times 6261 step by step
9901 × 6261 = 6261 × (9901)
+ 6261 × 1 what gives us 6261
+ 6261 × 00 that is equal 0
+ 6261 × 900 yielding 5634900
+ 6261 × 9000 that equals 56349000

= 61990161
