The toy factory produces a batch of toys, an average of 150 per day, and 350 after 6 days of production. How many toys are in this batch?
玩具厂生产一批玩具，平均每天生产150个，生产了6天还差350个，这批玩具共有多少个？
<gadget id="calculator">150 * 6</gadget>
<output>900</output>

<gadget id="calculator">900 + 350</gadget>
<output>1_250</output>

<result>1_250</result>