Jerome bought 5 new toy cars last month. This month he bought twice as many so that he has 40 toy cars now. How many toy cars did Jerome have originally?
Jerome bought 5 x 2 = 
<gadget id="calculator">5*2</gadget>
<output>10</output>
10 toy cars this month.
So he bought a total of 5 + 10 = 
<gadget id="calculator">5+10</gadget>
<output>15</output>
15 toy cars.
Therefore, Jerome had 40 - 15 = 
<gadget id="calculator">40-15</gadget>
<output>25</output>
25 toy cars originally.

<result>25</result>