The 72 saplings are planned to be planted in grades 6 and 5 at a ratio of 5:4. In the actual planting process, grade 6 overfulfilled by 20%. How many saplings were actually planted in grade 5?
72棵树苗计划按5：4分给六年级和五年级种植，实际种植过程中，六年级超额完成了20%，五年级实际种植了多少棵？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">72 * (5/9) * (6/5)</gadget>
<output>48</output>

<gadget id="calculator">72 - 48</gadget>
<output>24</output>

<result>24</result>