A car drives from A to B, travels 50 kilometers per hour when going there, and travels 60 kilometers per hour when returning. It takes 5.5 hours to go back and forth. How many kilometers are there between A and B?
一辆汽车从甲地开往乙地，去时每小时行50千米，返回时每小时行60千米，来回共用5.5小时，甲、乙两地相距多少千米？
<gadget id="calculator">60 * 5.5</gadget>
<output>330</output>

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

<gadget id="calculator">330 / 110</gadget>
<output>3</output>

<gadget id="calculator">3 * 50</gadget>
<output>150</output>

<result>150</result>