Any easier way to solve complex calculations in this?

Question

dls · Answer

$$1/2*9.1*10^{-31} * (6.4)^{2}  * 10^{16} $$

usukidoll · Answer

no ;___;

anonymous · Answer

no alternate just calculation though you can calculate it faster using vedic math

dls · Answer

I mean i want a better approach to solve this :P 
just an easier way..without calculator and stuff

anonymous · Answer

though you can have approximate answer by assuming 9.1 as--  9 and 6.4 as--  6.5

anonymous · Answer

solve 9.1*6.4*3.2..........if u want an accurate answer. otherwise, round them off.

dls · Answer

I always get the exponent power wrong! Ive got this part correct 186.368 what would be  the notation for 10?

anonymous · Answer

$$10^{-31} \times 10^{16} = 10^{-31+16} = 10^{-15}$$

dls · Answer

186.368 * 10^-15?
in standard form?

dls · Answer

I got power as -17 but its -21!!

anonymous · Answer

it can't be. it has to 1.86368 * 10^(-13)

dls · Answer

1.864*10^-21

anonymous · Answer

u sure u gave us the right question?

dls · Answer

yes

anonymous · Answer

i don't know...even my calculator says -13.....maybe there's a misprint?

dls · Answer

this has been happening with me with all the questions..:/

anonymous · Answer

then i'd say there's something wrong with ur book. ur calculations are correct. just move on to the next sum.

dls · Answer

lol ncert tune bhi kari hai :/

anonymous · Answer

haan toh, har book mein misprints hote hain! at this stage, don't pay so much attention to the final figure. if ur procedure is correct, then just move on.

dls · Answer

okay