In order to protect the environment, Xiaoqiang's family uses 77 fewer plastic bags a week on average than last year. According to this calculation, how many plastic bags can be used less in a year? (A year is calculated as 52 weeks.)
为了环保，小强家平均一个星期比去年少用塑料袋77个，照这样计算，一年能少用多少个塑料袋？(一年按52个星期计算．)
<gadget id="calculator">77 * 52</gadget>
<output>4_004</output>

<result>4_004</result>