That is, the multiplication of the two on the left is equal to the lower right, so the third one is 54, and the fourth one is unclear.

The rule of circles is: the product of the upper two circles is equal to the square, and the product of the lower two is twice the square. Just fill in according to the rules.

six

9 that is 548 1, and those two are 9.

nine

In the bottom row, the third one is 8.

nine

The fourth one is full of three.

9 Xiamian 6

nine