There are 3360 trees to be planted in the orchard, one row for every 40 trees, 62 rows have been planted, how many rows are left to be planted?
果园里要栽3360棵树，每40棵栽一行，已经栽了62行，还剩多少行没有栽？
<gadget id="calculator">3_360 / 40</gadget>
<output>84</output>

<gadget id="calculator">84 - 62</gadget>
<output>22</output>

<result>22</result>