small car drives from place A to place B, traveling 52 kilometers per hour. It has been driving for 7 hours, and it is still 128 kilometers away from the midpoint. What is the total length of places A and B in kilometers?
一辆小车从甲地开往乙地，每小时行52千米，已行了7小时，离中点还有128千米，甲乙两地总长多少千米．
<gadget id="calculator">52 * 7</gadget>
<output>364</output>

<gadget id="calculator">364 + 128</gadget>
<output>492</output>

<gadget id="calculator">492 * 2</gadget>
<output>984</output>

<result>984</result>