Android SQLite query return scientific number format

I have a query in my sqlite like this

String query = "select id_temp, id_product, supplier_name, category_name, product_name, " +
                "product_brand, product_unit_measure, product_dimension, product_purchase_price, product_selling_price," +
                "quantity, product_purchase_price * quantity as subtotal from table_temp";

but the result from subtotal return scientific number 4.17505e+06. The value of product_purchase_price = 41750.5 and quantity = 100 and the data type for both field is numeric if we perform an addition operation it must be 4175050. Any idea why this result happen? Thanks in advance.