The senior students of two primary schools participated in the performance group gymnastics together. 450 students from school A were transferred (1/5) to join the team of school B. At this time, school A happened to belong to school B (6/7). How many people did school B have? ?
两所小学的高年级学生共同参加表演团体操，甲校学生450人调出(1/5)加入乙校队伍，这时甲校正好是乙校的(6/7)，乙校原有多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">450 * (1/5)</gadget>
<output>90</output>

<gadget id="calculator">450 - 90</gadget>
<output>360</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">360 / (6/7)</gadget>
<output>420</output>

<gadget id="calculator">420 - 90</gadget>
<output>330</output>

<result>330</result>