No problem, we've got 71381873 and 19964768 to multiply
71381873 × 19964768 = 19964768 × (71381873)
+ 19964768 × 3 what gives us 59894304
+ 19964768 × 70 that is equal 1397533760
+ 19964768 × 800 giving us 15971814400
+ 19964768 × 1000 that is equal 19964768000
+ 19964768 × 80000 yielding 1597181440000
+ 19964768 × 300000 that equals 5989430400000
+ 19964768 × 1000000 what gives us 19964768000000
+ 19964768 × 70000000 that results in 1397533760000000

= 1425122533850464
