Question

The federal debt was 17.3 trillion in 2014 and 13,561,623 (in millions) in 2010. How much more was the federal debt in 2014 compared to 2010?

Answer 1

We have that
In 2014 --->  the federal debt was 17.3 trillion
n 2010----> the federal debt was 13,561,623 millions

we know that
one trillion----------> 1,000,000,000,000-----> 1 x 10^12
so
17.3 trillion-------> 17.3 x 10^12-----> 1.73 x 10^13
[1.73 x 10^13-13,561,623]=17,300,000,000,000-13,561,623]
=17,299,986,438,377

the answer is
17,299,986,438,377