Please fill 1,2,3,4,5,6,7,8,9 in the following box without repeating each other to make the equation hold: mouth * mouth = mouth;

Please fill 1,2,3,4,5,6,7,8,9 in the following box without repeating each other to make the equation hold: mouth * mouth = mouth;

1738 * 4 = 6952
1963 * 4 = 7852