It takes 6 hours for a passenger car to go from point A to point B, and it takes 1 hour for a truck to go from point B to point A. Now the two cars drive from both places A and B at the same time. When they meet, the truck travels 90 kilometers. How many kilometers?
一辆客车从甲地到乙地要6小时，一辆货车从乙地到甲地要1小时，现在两车同时从甲乙两地相对开出相遇时货车行了90千米，甲乙两地相距多少千米？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) + 1</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">1 / (7/6)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">90 / (6/7)</gadget>
<output>105</output>

<gadget id="calculator">105 * 1</gadget>
<output>105</output>

<result>105</result>