jim's heart beats 75 times per minute. Calculate the number of times his heart beat during 50 weeks. Give your answer in standard form.

Hi !
I don't say very english.
Jim's heart beats on one day :
75 × 1 440 = 108000
One week :
108 000 × 7 = 756 000
During fifty weeks :
756 000 × 50 = ...

Rappel:
1 h = 60 min 
1 jour = 24 h
1 semaine = 7 jours

1 semaine = 7 jours = 7 * 24 h = 7 * 24 * 60 min
7 semaines = 7 * 7 * 24 * 60 = ...min
50 semaines = 50 * 7 * 24 * 60 = ... min
n semaines = n * 7 * 24 * 60