There are 630 kilograms of toffee and assorted candies in the supermarket, of which toffee accounts for 20%. Later, some toffee was shipped in. At this time, toffee accounted for 30% of the two kinds of sugar. How many kilograms of toffee were shipped later?
超市有奶糖和什锦糖共630千克，其中奶糖占20%，后来又运进来一些奶糖，这时奶糖占两种糖的30%，后来运来奶糖多少千克？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">630 * (4/5)</gadget>
<output>504</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">504 / (7/10)</gadget>
<output>720</output>

<gadget id="calculator">720 - 630</gadget>
<output>90</output>

<result>90</result>