How can i string filter but for number?

Hey im still new to prisma and basically i want this getId Method to work:

async test(id)
   this.prisma.idTable.findMany({
        where: {
            id: {contains: id} 
})

async test(id)
   this.prisma.idTable.findMany({
        where: {
            id: {contains: id} 
})

but apparently it only works for strings and toString the id doesnt work aswell so helpp?

How can i string filter but for number? - Prisma