The students planted trees, 32 trees were planted in the fourth grade, 18 trees were planted three times less than the fourth grade in the sixth grade, how many fewer trees were planted in the fourth grade than in the sixth grade?
同学们栽树，四年级栽了32棵，六年级栽的棵数比四年级的3倍少18棵，四年级比六年级少栽多少棵？
<gadget id="calculator">32 * 3</gadget>
<output>96</output>

<gadget id="calculator">96 - 18 - 32</gadget>
<output>46</output>

<result>46</result>