No problem, we've got 81467894 and 79105455 to multiply
81467894 × 79105455 = 79105455 × (81467894)
+ 79105455 × 4 that results in 316421820
+ 79105455 × 90 yielding 7119490950
+ 79105455 × 800 that equals 63284364000
+ 79105455 × 7000 that equals 553738185000
+ 79105455 × 60000 what gives us 4746327300000
+ 79105455 × 400000 yielding 31642182000000
+ 79105455 × 1000000 that equals 79105455000000
+ 79105455 × 80000000 that results in 6328436400000000

= 6444554822761770
