No problem, we've got 87219673 and 7895354 to multiply
87219673 × 7895354 = 7895354 × (87219673)
+ 7895354 × 3 what gives us 23686062
+ 7895354 × 70 which equals 552674780
+ 7895354 × 600 yielding 4737212400
+ 7895354 × 9000 that equals 71058186000
+ 7895354 × 10000 that equals 78953540000
+ 7895354 × 200000 yielding 1579070800000
+ 7895354 × 7000000 giving us 55267478000000
+ 7895354 × 80000000 resulting in 631628320000000

= 688630194099242
