Xiaohua and Xiaoli rode bicycles from two places at the same time and walked toward each other. Xiaohua drives 20 kilometers per hour, and Xiaoli drives 18 kilometers per hour. When the two met, they were 2 kilometers away from the midpoint of the journey. How many kilometers did they drive in total?
小华和小力同时从两地骑车相向而行．小华每小时行驶20千米，小力每小时行驶18千米，两人相遇时距离全程中点2千米，他们一共行驶了多少千米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">20 + 18</gadget>
<output>38</output>

<gadget id="calculator">2 * 38</gadget>
<output>76</output>

<result>76</result>