Two cars drive from A to B at the same time. It takes 4 hours for a car to drive from A to B, and 6 hours for a truck to drive from B to A. When the two cars meet, the truck leaves A. There are still 36 kilometers. How many kilometers are there between A and B?
两辆汽车同时从甲乙两地相对开出，一辆小汽车从甲地开往乙地要4小时，另一辆卡车从乙地开往甲地需要6小时，当两车相遇卡车离甲地还有36千米，甲乙两地相距多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/4) + (1/6)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 / (5/12)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">36 / (12/5)</gadget>
<output>15</output>

<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / (3/2)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">36 / (12/5) / (2/3)</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">15 + (45/2)</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">(75/2) * (12/5)</gadget>
<output>90</output>

<result>90</result>