A truck drives from place A to place B, traveling the whole distance (1/4), and there is still 40 kilometers away from the midpoint of the two places. How far is the distance between places A and B?
一辆货车从甲地开往乙地，行了全程的(1/4)，距离两地中点还有40千米，甲乙两地相距多远？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 / (1/4)</gadget>
<output>160</output>

<result>160</result>