Final answer:
To calculate the down payment, multiply the purchase price by the percentage of the down payment.
Step-by-step explanation:
To calculate the down payment on a house purchase, you would multiply the purchase price by the percentage of the down payment. In this case, the purchase price is $213,600 and the down payment is 10%.
So, $213,600 * 0.10 = $21,360.
Therefore, the down payment on the house would be $21,360.