Hongxing Primary School bought a batch of children's books and distributed them to 42 classes. Each class was divided into 37 books, and there were 126 books left. How many children's books did Hongxing Primary School buy?
红星小学买来一批儿童读物，分给42个班，每班分37本，还剩126本．红星小学共买来多少本儿童读物？
<gadget id="calculator">42 * 37</gadget>
<output>1_554</output>

<gadget id="calculator">1_554 + 126</gadget>
<output>1_680</output>

<result>1_680</result>