The road between A and B is 320 kilometers long. A car travels from A to B for the entire distance (3/8). How far is it from the midpoint?
甲、乙两地之间的公路长320千米，一辆汽车从甲地开往乙地，行了全程的(3/8)，这时离中点还有多远？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">320 * (1/8)</gadget>
<output>40</output>

<result>40</result>