△/6=30…△, what is the maximum number of the dividend
△/6=30…△，被除数最大填多少
<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">180 + 5</gadget>
<output>185</output>

<result>185</result>