rectangular vegetable field is 90 decimeters long and 60 decimeters wide, what is its area in square meters?
一块长方形的菜地长是90分米，宽是60分米，它的面积是多少平方米？
<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>