The school organized students to participate in voluntary labor. The fourth grade planted 108 chrysanthemums, and the sixth grade planted 58 chrysanthemums three times less than the fourth grade. How many fewer plants are planted in the fourth grade than in the sixth grade?
学校组织学生参加义务劳动，四年级栽了108株菊花，六年级栽的株数比四年级的3倍少58株．四年级比六年级少栽多少株？
<gadget id="calculator">108 * 3</gadget>
<output>324</output>

<gadget id="calculator">324 - 58 - 108</gadget>
<output>158</output>

<result>158</result>