No problem, we've got 89263423 and 99899398 to multiply
89263423 × 99899398 = 99899398 × (89263423)
+ 99899398 × 3 what gives us 299698194
+ 99899398 × 20 that equals 1997987960
+ 99899398 × 400 that equals 39959759200
+ 99899398 × 3000 yielding 299698194000
+ 99899398 × 60000 giving us 5993963880000
+ 99899398 × 200000 resulting in 19979879600000
+ 99899398 × 9000000 what gives us 899094582000000
+ 99899398 × 80000000 giving us 7991951840000000

= 8917362221119354
