There is a rectangular land with a length of 105 meters and a width of 90 meters. Plant a tree every 3 meters around the land. How many saplings should be planted in total?
有一块长方形的地，长是105米，宽是90米，在这块地的四周每隔3米种一棵树，一共要种多少棵树苗．
<gadget id="calculator">105 + 90</gadget>
<output>195</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">195 * (2/3)</gadget>
<output>130</output>

<result>130</result>