Teacher Wang bought 3 bottles of ink at 1.25 yuan each, and 2 pens at 3.4 yuan each. How much did you spend on these things?
王老师买了3瓶墨水，每瓶1.25元，又买了2支钢笔，每只3.4元．买这些东西一共花了多少元？
<gadget id="calculator">1.25 * 3</gadget>
<output>3.75</output>

<gadget id="calculator">3.4 * 2</gadget>
<output>6.8</output>

<gadget id="calculator">3.75 + 6.8</gadget>
<output>10.55</output>

<result>10.55</result>