Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Ruel a quatre livres de 10 timbres et six livres de 15 timbres. Combien de timbres Ruel a-t-il ?


### Response:
 Quatre livres ont 4 x 10 = <<4*10=40>>40 timbres.
Et, six livres ont 6 x 15 = <<6*15=90>>90 timbres.
Donc, Ruel a 40 + 90 = <<40+90=130>>130 timbres.