Walter bought 60 apples from the store. He ate 2/5 of them and gave his sister 25% of the remaining number. If he then sold the remaining apples to his uncle at $3 each, how much money did he receive?
From the 60 apples that Walter bought, he ate 2/5*60=
<gadget id="calculator">2/5*60</gadget>
<output>24</output>
24 apples.
The number of apples remaining was 60-24=
<gadget id="calculator">60-24</gadget>
<output>36</output>
36.
Walter gave 25/100*36=
<gadget id="calculator">25/100*36</gadget>
<output>9</output>
9 apples to his sister.
He remained with 36-9=
<gadget id="calculator">36-9</gadget>
<output>27</output>
27 apples.
He then sold the apples for 27*$3=$
<gadget id="calculator">27*3</gadget>
<output>81</output>
81 to his uncle.

<result>81</result>