Plant tomatoes on a 15-meter-long and 12-meter-wide vegetable plot, with an average of 9 tomatoes per square meter. How many tomatoes can be planted in this plot?
在一块长15米、宽12米的菜地上种西红柿，平均每平方米种西红柿9株，这块地共可以种多少株西红柿？
<gadget id="calculator">15 * 12 * 9</gadget>
<output>1_620</output>

<result>1_620</result>