Xiao Ming planted 180 saplings per hour, and Xiao Jun planted 120 saplings per hour. The two planted trees at the same time, and it was completed in 6 hours. How many saplings were there in total?
小明每小时种了180棵树苗，小军每小时种了120棵树苗，两人同时种树，6小时后完成，这批树苗一共有多少棵？
<gadget id="calculator">180 * 6</gadget>
<output>1_080</output>

<gadget id="calculator">120 * 6</gadget>
<output>720</output>

<gadget id="calculator">1_080 + 720</gadget>
<output>1_800</output>

<result>1_800</result>