At 7 o'clock in the morning, Xiao Ming and Xiao Qiang set off from places A and B at the same time, and they walked toward each other at a constant speed. At 8:20, the distance between the two was 10 kilometers. When Xiaoming arrives at B, how many kilometers is Xiaoqiang from A?
早上7点，小明和小强从甲、乙两地同时出发，以不变的速度相向而行，8点20时两人相距10千米，9点时，两人相距还是10千米.10点时小明到达乙地，这时小强距离甲地多少千米？
<gadget id="calculator">10 + 10</gadget>
<output>20</output>

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

<gadget id="calculator">20 / (2/3)</gadget>
<output>30</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">30 * (4/3)</gadget>
<output>40</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">50 / 3</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">30 - (50/3)</gadget>
<output>40/3 = around 13.333333</output>

<gadget id="calculator">(40/3) * 3</gadget>
<output>40</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<result>10</result>