Large Calculations to Hours, Minutes, Seconds

Am I correct in thinking I have worked out the following question correctly?

Question 1

1.77843714 × 1014 (please note the raising of 14, not sure how to do subscript) divided by 15 thousand million commands per sec.

I worked this out as:

**177 843 714 000 000 divided by 15 000 000 000 = 11 856.2476 secs**

Before carrying on ... My concerns

a) Have I converted 1.77843714 × 10**14** to the correct long form of 177 843 714 000 000?

b) Have I added the correct number of 0's for 15 thousand million ( 15 000 000 000 )?

OK

Now for converting to Hours, minutes, seconds....

11 856.2476 secs in hours =(11 856.2476 / 60) / 60 = 3.29340211 hours

My concerns

Have I used the right calculation for changing into hours and I am guessing that the number after the decimal is a deciamal of the hours (or fraction of the hours?) so I would have to take the .29340211 and do the following..........

(60 / 100) * 0.29340211 = 0.176041266

So I now have 3 hours and 176041266 minutes (Am I correct)

Now ater this (If I am thinking along the right lines, how would I get the minutes??)