A shopping mall held a "Welcome the Dragon Boat Festival" promotion, buy 3 kilograms of rice dumplings and get 1 kilogram free. 24.4 yuan per kilogram of zongzi, how much did my mother pay for 8 kilograms?
某商场举办"迎端午"促销活动，粽子买3千克送1千克．每千克粽子24.4元，妈妈买了8千克，花了多少钱？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">24.4 * 6</gadget>
<output>146.4</output>

<result>146.4</result>