A car has driven 40% of the journey from place A to place B, and there is still 60km away from place B. How many kilometers are there between places A and B?
一辆汽车从甲地开往乙地，已行了全程的40%，距乙地还有60km，甲乙两地相距多少km．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<result>100</result>