A car drives from place A to place B at 9 am in the morning and arrives at 12 noon at a speed of 45 kilometers per hour. How many kilometers is the distance between places A and B?
一辆汽车早上9时从甲地开往乙地，中午12时到达，每小时行驶45千米，甲、乙两地相距多少千米？
<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<result>135</result>