Step-by-step explanation:
[tex]2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 9 \times 10 \times 20 \times 31 \times 41 \times 42 \\ 6 \times 20 \times 42 \times 90 \times 620 \times 1722 \\ 120 \times 3780 \times 1,067,640 \\ 453,600 \times 1067640 \\
= 4.84281504 \times {10}^{11} [/tex]
