Heath spent his weekend helping at his uncle’s farm planting carrots. He planted 400 rows of carrots with 300 plants in each row. He used a machine to get the planting done and it took him 20 hours. How many carrots did he plant each hour?
Heath planted 400 rows x 300 plants = 
<gadget id="calculator">400*300</gadget>
<output>120_000</output>
120,000 carrot plants.
He planted 120,000 plants in 20 hours, or 120,000 / 20 = 
<gadget id="calculator">120000/20</gadget>
<output>6_000</output>
6,000 plants per hour.

<result>6_000</result>