Alright, let's work through 86737241 times 43743521 step by step
86737241 × 43743521 = 43743521 × (86737241)
+ 43743521 × 1 resulting in 43743521
+ 43743521 × 40 yielding 1749740840
+ 43743521 × 200 which equals 8748704200
+ 43743521 × 7000 that results in 306204647000
+ 43743521 × 30000 producing 1312305630000
+ 43743521 × 700000 what gives us 30620464700000
+ 43743521 × 6000000 giving us 262461126000000
+ 43743521 × 80000000 resulting in 3499481680000000

= 3794192323165561
