Xiaohua weaves a 120 cm long scarf. On the first day, she knits 15% of the total length, and on the second day, she knits 25% of the total length. How many centimeters are left unwoven?
小华织一条120厘米长的围巾，第一天织了全长的15%，第二天织了全长的25%，还剩下多少厘米没有织．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/20) - (1/4)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 * (3/5)</gadget>
<output>72</output>

<result>72</result>