Beibei bought a piece of eraser, which was 3 cm 5 mm long, but 9 mm was used up. How long is this eraser now?
贝贝买来一块橡皮，原来长3厘米5毫米，用去9毫米．现在这块橡皮有多长？
<gadget id="calculator">35 - 9</gadget>
<output>26</output>

<result>26</result>