It seems that the logical solution to this is to turn both of these formatted numbers into real numbers.
[tex]1.35 * 10^6 = 135,000\\1.08 * 10^5 = 10,800[/tex]
Get the amount produced each second by:
[tex]135,000 / 10,800 = 12.5 per second[/tex]
Get the amount in one minute:
[tex]12.5 * 60 = 750[/tex]
Get the amount in one hour:
[tex]750 * 60 = 45,000[/tex]
Get the amount in 60 hours:
[tex]45,000 * 60 = 2,700,000[/tex]
In 60 hours, 2,700,000 frozen pancakes are produced.