Marly has ten $20 bills, eight $10 bills, and four $5 bills. If she wants to change her bills to $100 bills, how many pieces of $100 bills will she have?
The ten $20 bills amount to $20 x 10 = $
<gadget id="calculator">20*10</gadget>
<output>200</output>
200.
The eight $10 bills amount to $10 x 8 = $
<gadget id="calculator">10*8</gadget>
<output>80</output>
80.
The four $5 bills amount to $5 x 4 = $
<gadget id="calculator">5*4</gadget>
<output>20</output>
20.
So, Marly has a total of $200 + $80 + $20 = $
<gadget id="calculator">200+80+20</gadget>
<output>300</output>
300.
Therefore, she will have $300/$100 = 
<gadget id="calculator">300/100</gadget>
<output>3</output>
3 pieces of $100 bills.

<result>3</result>