There are 70 students in Class 4, Grade 6, Jingyuan No. 3 Primary School, and the number of students in Grade 6 is Class 4 (4/7). How many students are there in Grade 1?
泾源三小六年级4班有学生70人，一年级学生人数是六4班的(4/7)，一年级有学生多少人？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">70 * (4/7)</gadget>
<output>40</output>

<result>40</result>