To protect the environment, the fourth grade collected 73.5 kilograms of waste, and the fifth grade collected 1.2 times that of the fourth grade. How many kilograms were collected by the two grades?
保护环境，四年级收集废品73.5千克，五年级收集的是四年级的1.2倍，两个年级一共收集了多少千克？
<gadget id="calculator">73.5 * 1.2</gadget>
<output>88.2</output>

<gadget id="calculator">88.2 + 73.5</gadget>
<output>161.7</output>

<result>161.7</result>