Answer: 471944999999999967232
Explanation:
(1.945)(1000000000000000000)+4.7(1020)
=1945000000000000000+4.7(1020)
=1945000000000000000+(4.7)(100000000000000000000)
=1945000000000000000+470000000000000000000
=471944999999999967232
