Each copy of "Chinese" is 7.51 yuan, and each copy of "Mathematics" is 6 yuan.
《语文》每本7.51元，《数学》每本6元8角4分，现有15元钱，买《语文》、《数学》各一本，还剩多少元？
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">6 + (4/5) + (1/25)</gadget>
<output>171/25 = around 6.84</output>

<gadget id="calculator">7.51 + (171/25)</gadget>
<output>14.35</output>

<gadget id="calculator">15 - 14.35</gadget>
<output>0.65</output>

<result>0.65</result>