Eight teams planted a total of 120 trees, and the number of trees planted by each team was different. Among them, the team that planted the most trees was 20. Ask the team that planted the least number of trees at least.
八个小队共种120棵树，各小队种树数不相同．其中种树最多的小队是20棵，问最少的小队至少要种多少棵．
<gadget id="calculator">20 + 19 + 18 + 17 + 16 + 15 + 14</gadget>
<output>119</output>

<gadget id="calculator">120 - 119</gadget>
<output>1</output>

<result>1</result>