Joan has 2 hours to get all her music practice done. She spends 30 minutes on the piano, 25 minutes writing music on her computer, and 38 minutes reading about the history of the piano. Her final work is to use a special finger exerciser. How much time does she have left to use this?
She has 120 minutes to practice because 2 x 60 = 
<gadget id="calculator">2*60</gadget>
<output>120</output>
120.
She has already spent 93 minutes on her work because 30 + 25 + 38 = 
<gadget id="calculator">30+25+38</gadget>
<output>93</output>
93.
She has 27 minutes to use on finger exercise because 120-93 = 
<gadget id="calculator">120-93</gadget>
<output>27</output>
27.

<result>27</result>