A and B start from two places AB at the same time and walk toward each other. After walking for 3 hours, they are 50 kilometers apart. After another 2 hours, they are still 10 kilometers apart. How many kilometers are the distance between AB and AB?
甲乙两人分别从AB两地同时出发相向而行，行了3小时后，两人相距50千米，又行了2小时，两人还相距10千米，AB两地相距多少千米？
<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">60 + 50</gadget>
<output>110</output>

<result>110</result>