No problem, we've got 87889358 and 78958585 to multiply
87889358 × 78958585 = 78958585 × (87889358)
+ 78958585 × 8 resulting in 631668680
+ 78958585 × 50 resulting in 3947929250
+ 78958585 × 300 what gives us 23687575500
+ 78958585 × 9000 which equals 710627265000
+ 78958585 × 80000 that equals 6316686800000
+ 78958585 × 800000 which equals 63166868000000
+ 78958585 × 7000000 that is equal 552710095000000
+ 78958585 × 80000000 which equals 6316686800000000

= 6939619344238430
