Calculation: 4.75-9.64+8.25-1.36=how much.
计算：4.75-9.64+8.25-1.36=多少．
<gadget id="calculator">4.75 - 9.64</gadget>
<output>-4.89</output>

<gadget id="calculator">8.25 - 1.36</gadget>
<output>6.89</output>

<gadget id="calculator">(-4.89) + 6.89</gadget>
<output>2</output>

<result>2</result>