Polo the Penguin and the Numbers

Read problems statements in Russian here Polo, the Penguin, likes numbers. He says that the goodness of a number is itself multiplied by the number of digits in it's decimal representation. For example, the goodness of the integer 474 is 474*3 = 1422. Help him to count the sum of goodness of all integers from L to R, inclusive. Since the answer can be too large, output it modulo 1,000,000,007 (1