What is the difference of subtracting 4 (7/8) from 8.5 and dividing by 0.5?
8.5减去4个(7/8)的差再除0.5，是多少？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(7/8) * 4</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">8.5 - (7/2)</gadget>
<output>5</output>

<gadget id="calculator">0.5 / 5</gadget>
<output>0.1</output>

<result>0.1</result>