Tom receives a $12 allowance per month. In the first week, he spends a third of it; in the second week, he spends a quarter of what he has left. How much money does he have left to finish the month?
The first week he spends: $12 * 1/3 = $
<gadget id="calculator">12*1/3</gadget>
<output>4</output>
4.
So he has $12 - $4 = $
<gadget id="calculator">12-4</gadget>
<output>8</output>
8 left.
In the second week, he spends $8 x 1/4 = $
<gadget id="calculator">8*1/4</gadget>
<output>2</output>
2.
So Tom has $8 - $2 = $
<gadget id="calculator">8-2</gadget>
<output>6</output>
6 left to finish the month.

<result>6</result>