From point A to point B, car A travels 60 kilometers per hour, and immediately returns to travel 45 kilometers per hour. If it takes 4.2 hours to go back and forth without any pause, how many kilometers is the distance between A and B?
从A地到B地，甲车每小时行60千米，立即返回每小时行45千米，如果没有任何停顿的情况下往返共用4.2小时，那么AB两地相距多少千米？
<gadget id="calculator">45 * 4.2</gadget>
<output>189</output>

<gadget id="calculator">60 + 45</gadget>
<output>105</output>

<gadget id="calculator">189 / 105</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">60 * (9/5)</gadget>
<output>108</output>

<result>108</result>