Answer:
1.5 by the power of 20. I did it in the calculator and got this big number which is 33252.5673008. 4 x 1.5 is 5 so by the power of 20 which would be 6x6x6x6x6x6x6x6x6x6x6x6x6x6x6x6x6x6x6x6 which gives me 3.6561584e+15. This has me confused too :P
Explanation: