Four-Numbers

In Japan, car license plates is a four-digit number.
Four numbers of some car license plates becomes an equation, and it is interesting to consider whether they make up the equation.
This app provides you many quizzes of such four numbers, so make an equation by combine the four numbers and the five mathematical signs (＋－×÷＝).
Your average time to solve and the number of quizzes you solved
Lets aim for the top ranking in your average time and the number of quizzes you solved.