Grandpa Li has a rectangular piece of land with a length of 10 meters and a width of 8.5 meters. If two apple trees are planted per square meter in this land, how many apple trees can be planted in Grandpa Li’s land?
李爷爷有一块长10米，宽8.5米的长方形土地，如果在这块地里每平方米种2棵苹果树，那么李爷爷的这块地共可种几棵苹果树？
<gadget id="calculator">10 * 8.5 * 2</gadget>
<output>170</output>

<result>170</result>