Xiaofang has 22.6 yuan and Xiaohong has 44.7 yuan. They jointly buy a blue ball. The price of a blue ball is 90 yuan. How much money do they have?
小方有22.6元，小红有44.7元，他们合买一个蓝球，一个蓝球的价格是90元，他们还差多少钱？
<gadget id="calculator">22.6 + 44.7</gadget>
<output>67.3</output>

<gadget id="calculator">90 - 67.3</gadget>
<output>22.7</output>

<result>22.7</result>