For a basket of pears, first take away 30kg, and then take out the remaining 70%. At this time, the remaining pears are exactly the original (1/10). How many kilograms is this basket of pears?
一筐梨，先拿走30kg，又拿出余下的70%，这时剩下的梨正好是原来的(1/10)．这筐梨原来多少kg？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/10) / (3/10)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 / (2/3)</gadget>
<output>45</output>

<result>45</result>