The school originally bought 425 science and technology books, and bought 158 new books this year. How many science and technology books does the school have now?
学校原有科技书425本，今年又新买来158本．学校现在有科技书多少本？
<gadget id="calculator">425 + 158</gadget>
<output>583</output>

<result>583</result>