No problem, we've got 21240670 and 6403241 to multiply
21240670 × 6403241 = 6403241 × (21240670)
+ 6403241 × 0 that is equal 0
+ 6403241 × 70 that equals 448226870
+ 6403241 × 600 that equals 3841944600
+ 6403241 × 0000 resulting in 0
+ 6403241 × 40000 producing 256129640000
+ 6403241 × 200000 yielding 1280648200000
+ 6403241 × 1000000 what gives us 6403241000000
+ 6403241 × 20000000 yielding 128064820000000

= 136009129011470
