In the registration activity of the interest group on the Happy Activity Day, a total of 240 students from a certain school signed up for the art group and dance group, and the number of people who signed up for the dance group was 1.4 times that of the art group. How many people signed up for the art group?
在快乐活动日兴趣组报名活动中，某校同学报名参加美术组和舞蹈组的共有240人，报名参加舞蹈组的人数是美术组的1.4倍，报名参加美术组的有多少人？
<gadget id="calculator">1.4 + 1</gadget>
<output>2.4</output>

<gadget id="calculator">240 / 2.4</gadget>
<output>100</output>

<result>100</result>