Howard spends $8 dollars at the arcade on Monday. On Tuesday, he spends twice as much at the arcade as he did on Monday. On Wednesday, he spends 4 times as much at the arcade as he spent on Tuesday. If he originally had $100, how much money does he have left?
On Tuesday, he spends $8 * 2 = $
<gadget id="calculator">8*2</gadget>
<output>16</output>
16.
On Wednesday, he spends $16 * 4 = $
<gadget id="calculator">16*4</gadget>
<output>64</output>
64.
In total he spent $8 + $16 + $64 = $
<gadget id="calculator">8+16+64</gadget>
<output>88</output>
88 at the arcade.
He has $100 - $88 = $
<gadget id="calculator">100-88</gadget>
<output>12</output>
12 left.

<result>12</result>