A telephone line is 15 decimeters, and 6 such long telephone lines are connected together (not counting the joints), how many meters is the length?
一根电话线15分米，6根这样长的电话线接在一起(不计接头处)，长多少米？
<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<result>9</result>